Number of subsets of {1...n} containing no element > 1 whose prime indices all belong to the subset.

A324738

Number of subsets of {1...n} containing no element > 1 whose prime indices all belong to the subset.

Terms

    a(0) =1a(1) =2a(2) =3a(3) =5a(4) =8a(5) =13a(6) =26a(7) =42a(8) =72a(9) =120a(10) =232a(11) =376a(12) =752a(13) =1128a(14) =2256a(15) =4512a(16) =8256a(17) =13632a(18) =27264a(19) =42048a(20) =82944a(21) =158976a(22) =313344a(23) =497664a(24) =995328a(25) =1700352a(26) =3350016a(27) =5815296a(28) =11630592a(29) =17491968

External references